Solar panel



FIG. 1 is a perspective view of a top, front and right side of a solar panel showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof, the left side view is symmetrical thereto;

FIG. 4 is a top plan view thereof, the bottom view is identical thereto; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a solar panel, as shown and described. 